Fine structure of spermatogenesis in the spider crab Lissa chiragra (Fabricius, 1775) (Eubrachyura, Epialtidae)

What is it about?

This study divided the seminiferous tubule into germinal, transformation and evacuation zones. The transformation or the maturation zone occupies the central area. The evacuation zone lies at a pole opposite to the germinal zone. The anterior vas deferens is a tube where the formation of the spermatophore occurs by means of secretions from its epithelium. The ejaculatory duct is located between the muscles of the coxae of the fifth walking legs. This study concluded that the complex acrosome vesicle is formed from during spermiogenesis; in the cytoplasm, the membrane system, constituted by the endoplasmic reticulum, Golgi apparatus and vesicles associated with microtubules, few mitochondria. The Golgi apparatus is developed and is organized progressively to produces various vesicles. This system forms a ring at the base nuclear extensions, the merger of the plasma and nuclear membranes, which result in a pentalaminar membranous structure in some regions of the cell surface.

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